diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 450930462c5f..5326f795c222 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -717,7 +717,7 @@ in {
 
   mailman-web = disabledIf (!isPy3k) (callPackage ../servers/mail/mailman/web.nix { });
 
-  mailmanclient = callPackage ../development/python-modules/mailmanclient { };
+  mailmanclient = disabledIf (!isPy3k) (callPackage ../development/python-modules/mailmanclient { });
 
   mailman-hyperkitty = callPackage ../development/python-modules/mailman-hyperkitty { };